Many speculated this and its finally here. Google has now officially launched mobile friendly label in the mobile search results to help its users to take decision quickly.
Also as reported by Search Engine Land, Google is now experimenting with a new ranking algorithm for mobile friendly web sites.
Its high time to switch your websites to responsive design if you haven’t done so. Google also recommends you test your site in the new Mobile-Friendly Test tool, review their mobile friendly guidelines and use various third-party tools to go mobile-friendly with your web site.